243878442 has 16 divisors (see below), whose sum is σ = 490071072. Its totient is φ = 80907120.

The previous prime is 243878417. The next prime is 243878443. The reversal of 243878442 is 244878342.

It is a junction number, because it is equal to n+sod(n) for n = 243878394 and 243878403.

It is not an unprimeable number, because it can be changed into a prime (243878443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95053 + ... + 97584.

It is an arithmetic number, because the mean of its divisors is an integer number (30629442).

Almost surely, 2^243878442 is an apocalyptic number.

243878442 is an abundant number, since it is smaller than the sum of its proper divisors (246192630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243878442 is a wasteful number, since it uses less digits than its factorization.

243878442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192853.

The product of its digits is 344064, while the sum is 42.

The square root of 243878442 is about 15616.6078903198. The cubic root of 243878442 is about 624.7761903710.

The spelling of 243878442 in words is "two hundred forty-three million, eight hundred seventy-eight thousand, four hundred forty-two".